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126 lines
6.8 KiB
C++
126 lines
6.8 KiB
C++
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/***************************************************************************
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* HopByHopHeader.h -- The HopByHopHeader Class represents an IPv6 *
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* Hop-by-Hop extension header. *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2020 Insecure.Com LLC ("The Nmap *
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* Project"). Nmap is also a registered trademark of the Nmap Project. *
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* *
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* This program is distributed under the terms of the Nmap Public Source *
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* License (NPSL). The exact license text applying to a particular Nmap *
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* release or source code control revision is contained in the LICENSE *
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* file distributed with that version of Nmap or source code control *
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* revision. More Nmap copyright/legal information is available from *
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* https://nmap.org/book/man-legal.html, and further information on the *
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* NPSL license itself can be found at https://nmap.org/npsl. This header *
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* summarizes some key points from the Nmap license, but is no substitute *
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* for the actual license text. *
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* *
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* Nmap is generally free for end users to download and use themselves, *
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* including commercial use. It is available from https://nmap.org. *
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* *
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* The Nmap license generally prohibits companies from using and *
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* redistributing Nmap in commercial products, but we sell a special Nmap *
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* OEM Edition with a more permissive license and special features for *
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* this purpose. See https://nmap.org/oem *
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* *
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* If you have received a written Nmap license agreement or contract *
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* stating terms other than these (such as an Nmap OEM license), you may *
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* choose to use and redistribute Nmap under those terms instead. *
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* *
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* The official Nmap Windows builds include the Npcap software *
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* (https://npcap.org) for packet capture and transmission. It is under *
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* separate license terms which forbid redistribution without special *
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* permission. So the official Nmap Windows builds may not be *
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* redistributed without special permission (such as an Nmap OEM *
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* license). *
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* *
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* Source is provided to this software because we believe users have a *
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* right to know exactly what a program is going to do before they run it. *
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* This also allows you to audit the software for security holes. *
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* *
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* Source code also allows you to port Nmap to new platforms, fix bugs, *
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* and add new features. You are highly encouraged to submit your *
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* changes as a Github PR or by email to the dev@nmap.org mailing list *
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* for possible incorporation into the main distribution. Unless you *
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* specify otherwise, it is understood that you are offering us very *
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* broad rights to use your submissions as described in the Nmap Public *
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* Source License Contributor Agreement. This is important because we *
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* fund the project by selling licenses with various terms, and also *
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* because the inability to relicense code has caused devastating *
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* problems for other Free Software projects (such as KDE and NASM). *
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* *
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* The free version of Nmap is distributed in the hope that it will be *
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties, *
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* indemnification and commercial support are all available through the *
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* Npcap OEM program--see https://nmap.org/oem. *
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* *
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***************************************************************************/
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/* This code was originally part of the Nping tool. */
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#ifndef __HOP_BY_HOP_HEADER_H__
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#define __HOP_BY_HOP_HEADER_H__ 1
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#include "IPv6ExtensionHeader.h"
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#define HOP_BY_HOP_MAX_OPTIONS_LEN 256*8
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#define HOPBYHOP_MIN_HEADER_LEN 8
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#define HOPBYHOP_MAX_HEADER_LEN (HOPBYHOP_MIN_HEADER_LEN + HOP_BY_HOP_MAX_OPTIONS_LEN)
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#define HOPBYHOP_MAX_OPTION_LEN 256
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class HopByHopHeader : public IPv6ExtensionHeader {
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protected:
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/* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Next Header | Hdr Ext Len | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
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. .
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. Options .
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. .
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
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struct nping_ipv6_ext_hopbyhop_hdr{
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u8 nh;
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u8 len;
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u8 options[HOP_BY_HOP_MAX_OPTIONS_LEN];
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}__attribute__((__packed__));
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typedef struct nping_ipv6_ext_hopbyhop_hdr nping_ipv6_ext_hopbyhop_hdr_t;
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/* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - - -
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| Option Type | Opt Data Len | Option Data
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - - - */
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struct nping_ipv6_ext_hopbyhop_opt{
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u8 type;
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u8 len;
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u8 data[HOPBYHOP_MAX_OPTION_LEN];
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}__attribute__((__packed__));
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typedef struct nping_ipv6_ext_hopbyhop_opt nping_ipv6_ext_hopbyhop_opt_t;
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nping_ipv6_ext_hopbyhop_hdr_t h;
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u8 *curr_option;
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public:
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HopByHopHeader();
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~HopByHopHeader();
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void reset();
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u8 *getBufferPointer();
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int storeRecvData(const u8 *buf, size_t len);
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int protocol_id() const;
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int validate();
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int print(FILE *output, int detail) const;
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/* Protocol specific methods */
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int setNextHeader(u8 val);
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u8 getNextHeader();
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int addOption(u8 type, u8 len, const u8 *data);
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int addPadding();
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}; /* End of class HopByHopHeader */
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#endif
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